对添加剂制造的钴铬合金扣的抛光效率进行体外评估

IF 3.2 2区 医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Journal of prosthodontic research Pub Date : 2024-02-28 DOI:10.2186/jpr.jpr_d_23_00258
Jyotetsu Takeyama, Toshitugu Sakurai, Hidemasa Shimpo, Noboru Kawamura, Chikahiro Ohkubo
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引用次数: 0

摘要

目的:对添加剂制造(AMed)的钴铬(Co-Cr)合金扣的处理和抛光过程和方法进行体外评估,以确定其是否适合持续临床使用并减少牙科技师的工作量:AMed Aker 合金扣是通过选择性激光烧结约 50 μm 的 Co-Cr 合金粉末制成的。在去除 AMed 卡环内表面的结节和鳍状物并进行形态校正后,牙科技师对卡环进行人工抛光作为对照。为了获得光滑的表面,进行了四种表面处理,包括滚筒精加工、喷丸强化以及干湿电抛光。此外,本研究还加入了混合制造技术,即通过重复激光烧结和高速铣削实现一次成型。使用扫描电镜和混合激光显微镜(HLM)观察处理过的表面后,测量了处理过的 AMed 扣的表面粗糙度、配合精度和保持力,并比较了它们的抛光效率:结果:与手工抛光类似,在所有处理方法中,干电解抛光的表面最光滑。所有扣区和处理方法的适配精度在 80 至 140 μm 之间,不同处理方法之间没有显著差异。所有处理过的扣都显示出临床使用上可接受的保持力,混合制造和湿电抛光显示出明显更高的保持力:经过所有表面处理的 AMed Co-Cr 扣环,如果再进行轻微的手工抛光,就可以在临床上使用。
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In vitro assessment of polishing efficiency for additive-manufactured Co–Cr alloy clasps

Purpose: The processes and methods of treating and polishing additive-manufactured (AMed) cobalt-chromium (Co–Cr) alloy clasps were assessed in vitro to determine their suitability for constant clinical use and the reduction of dental technician work.

Methods: AMed Aker clasps were fabricated by selective laser sintering of approximately 50 μm Co–Cr alloy powders. After the nodules and fins on the inner surface of the AMed clasps were removed and morphological correction was performed, a dental technician manually polished the clasps as a control. Four surface treatments, barrel finishing, shot peening, and wet and dry electropolishing, were performed to obtain smooth surfaces. In addition, hybrid manufacturing, which integrates repeated laser sintering and high-speed milling for one-process molding, was added to this study. After observing the treated surfaces using SEM and Hybrid Laser Microscope (HLM) the surface roughness, fitness accuracy, and retentive forces of the treated AMed clasps were measured, and their polishing efficiencies were compared.

Results: Similar to manual polishing, dry electropolishing yielded the smoothest surfaces in all treatments. The fitness accuracy of all clasp regions and treatment methods ranged from 80 to 140 μm, without significant differences among the treatment methods. All treated clasps showed acceptable retentive forces for clinical use, and hybrid manufacturing and wet electropolishing showed significantly higher forces.

Conclusions: AMed Co–Cr clasps with all surface treatments could be clinically used if additional slight manual polishing was performed; however, each processing condition should be carefully selected.

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来源期刊
Journal of prosthodontic research
Journal of prosthodontic research DENTISTRY, ORAL SURGERY & MEDICINE-
CiteScore
6.90
自引率
11.10%
发文量
161
期刊介绍: Journal of Prosthodontic Research is published 4 times annually, in January, April, July, and October, under supervision by the Editorial Board of Japan Prosthodontic Society, which selects all materials submitted for publication. Journal of Prosthodontic Research originated as an official journal of Japan Prosthodontic Society. It has recently developed a long-range plan to become the most prestigious Asian journal of dental research regarding all aspects of oral and occlusal rehabilitation, fixed/removable prosthodontics, oral implantology and applied oral biology and physiology. The Journal will cover all diagnostic and clinical management aspects necessary to reestablish subjective and objective harmonious oral aesthetics and function. The most-targeted topics: 1) Clinical Epidemiology and Prosthodontics 2) Fixed/Removable Prosthodontics 3) Oral Implantology 4) Prosthodontics-Related Biosciences (Regenerative Medicine, Bone Biology, Mechanobiology, Microbiology/Immunology) 5) Oral Physiology and Biomechanics (Masticating and Swallowing Function, Parafunction, e.g., bruxism) 6) Orofacial Pain and Temporomandibular Disorders (TMDs) 7) Adhesive Dentistry / Dental Materials / Aesthetic Dentistry 8) Maxillofacial Prosthodontics and Dysphagia Rehabilitation 9) Digital Dentistry Prosthodontic treatment may become necessary as a result of developmental or acquired disturbances in the orofacial region, of orofacial trauma, or of a variety of dental and oral diseases and orofacial pain conditions. Reviews, Original articles, technical procedure and case reports can be submitted. Letters to the Editor commenting on papers or any aspect of Journal of Prosthodontic Research are welcomed.
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